Smaller targets would be harder to hit from the fence. They go faster. They are cheaper. Got tight choke?
Just for "Yucks" we tried shooting mini's and most of the shooters did surprisingly well ... WPT ... (YAC) ...
The night we tried them was on a Friday night for fun and games night (orange at night, rather then our usual white) ... They were shot at from long and even longer yardage (27-30), I would be guessing but the majority of them got hit, yes they are fast and looked like aspirin tablets from back there, most of the really hard angles probably escaped ... Just one of those "Games People Play nights" if someone suggested it we tried it and always had a good time ... WPT ... (YAC) ...